I don't know of anything here to help you out. I hate to steer you away from here but you might try over on ck5. There's bound to be what you're looking for there in either the 'Garage' the tech formu, or one of the year/model specific forums. The members there are big on the diy4x parts, plus Kert is on there quite a bit.
http://www.coloradok5.com